diff --git a/developer_manual/digging_deeper/index.rst b/developer_manual/digging_deeper/index.rst
index 6c5f1389a..bd4d116f2 100644
--- a/developer_manual/digging_deeper/index.rst
+++ b/developer_manual/digging_deeper/index.rst
@@ -25,6 +25,7 @@ Digging deeper
    two-factor-provider
    users
    dashboard
+   projects
    groupware/index
    web_host_metadata
    status